STOCKHOLDERS' EQUITY (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			$ (57,372)
Other comprehensive income (loss) before reclassifications			28,139
Amounts reclassified from accumulated other comprehensive loss			3,500
OTHER COMPREHENSIVE INCOME, net of tax	29,908	1,683	31,639	3,406
Balance at the end of the period	(25,733)		(25,733)
Unrecognized Net Periodic Benefit Costs
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			(56,968)
Other comprehensive income (loss) before reclassifications			28,274
Amounts reclassified from accumulated other comprehensive loss			3,500
OTHER COMPREHENSIVE INCOME, net of tax			31,774
Balance at the end of the period	(25,194)		(25,194)
Foreign Currency Translation
Changes in accumulated other comprehensive loss, net of tax, by component
Balance at the beginning of the period			(404)
Other comprehensive income (loss) before reclassifications			(135)
OTHER COMPREHENSIVE INCOME, net of tax			(135)
Balance at the end of the period	$ (539)		$ (539)